Your position is already a bit bad (you have sacrified a piece). 18.Qf3 is making it worse, as it allows Be4.
18.h5 may indeed be your best try. Not because it brings the pawn nearer promotion (the verbal explanations are really not woth reading), but because if Black takes the pawn you get an open h-file againt their King, and thereby a possible attack.
Can someone help me figure this out. Makes no sense. Analyses telling my I should have move my H4 pawn to H5 , causing the bishop to retreat. But I have played an editor and stockfish does not do that and it makes no sense to me because the pawn would be easily captured. What am I and or the chess editor not seeing? I am using a Chessnut editor stockfish and it never brought the pawn to H5. Notice, I moved Queen to F3, and analyses told me that it's a mistake I should have moved Pawn to H5. The way it looks there like the queen could support it, but it was telling me to push the pawn and keep the Q @ C3
was 18th move of game
https://www.chess.com/analysis/game/live/102732664199?tab=review&move=34